# US 10,307,228 B2 · Retractor for periodontal surgery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,307,228 B2 - Document ID: US10307228B2 - Status: Granted - Kind: B2 - Application number: 15/022,502 - Filed: 2014-08-25 - Published: 2016-08-11 - Granted: 2019-06-04 - Earliest claimed: 2013-09-16 - Assignees: Ebi, LLC - Applicants: EBI Inc. - Inventors: Sang Choon Cho - Web page: https://patentgrep.com/patent/US10307228B2 ## CPC - A61C 9/0033: {Gingival retraction appliances} - A61B 17/02: for holding wounds open, e.g. retractors; Tractors - A61C 1/12: Angle hand-pieces - A61C 3/00: Dental tools or instruments (implanting tools A61C8/00; tools for fastening artificial teeth A61C13/12; visual inspection devices, e.g. dental mirrors, A61B1/24) - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A retractor for periodontal surgery includes an elongated handle from which extends a first connection portion and a second connection portion, with a blade extending from the second connection portion. The handle and the first connection portion are positioned at a first angle, the first connection portion and the second connection portion are positioned at a second angle. The first and second connection portions are generally co-planar. The blade is obliquely positioned at a third angle relative to the central axis of the second connection portion. The blade may be easily inserted into an incision in a patient's gum so as to retract the incision. ## Claims ### Claim 1 A retractor for periodontal surgery, which is used to lift up or retract an opening in a gum by being inserted into the opening, the retractor comprising: a handle having a long extended shape; a first connection portion comprising a first end portion and a second end portion, the first end portion of the first connection portion being connected to the handle; a second connection portion comprising a first end portion and a second end portion, the first end portion of the second connection portion being connected to the second end portion of the first connection portion; a blade connected to the second end portion of the second connection portion, wherein the handle and the first end portion of the first connection portion form a preset first angle, the preset first angle being about 20° to about 40°, the first end portion of the second connection portion and the second end portion of the first connection portion form a preset second angle, the preset second angle being about 60° to about 80°, and the first connection portion, the second connection portion, and the handle are located entirely on a same plane. ### Claim 2 (depends on 1) The retractor for periodontal surgery of claim 1, wherein the first connection portion linearly extends in a lengthwise direction. ### Claim 3 (depends on 1) The retractor for periodontal surgery of claim 1, wherein a length of the first connection portion is about 10 mm to about 12 mm. ### Claim 4 (depends on 1) The retractor for periodontal surgery of claim 1, wherein a length of the second connection portion is about 7 mm to about 9 mm. ### Claim 5 (depends on 1) The retractor for periodontal surgery of claim 1, wherein a length of the blade is about 5 mm to about 7 mm. ### Claim 6 (depends on 1) The retractor for periodontal surgery of claim 1, wherein a width of the blade is about 2.5 mm to about 3.5 mm. ### Claim 7 (depends on 1) The retractor for periodontal surgery of claim 1, wherein the blade is rotated by a preset third angle around a central axis of the second connection portion. ### Claim 8 (depends on 7) The retractor for periodontal surgery of claim 7, wherein the third angle is about 0° to about 10°. ### Claim 9 (depends on 1) The retractor for periodontal surgery of claim 1, wherein the second connection portion comprises: a root portion comprising a first end portion connected to the second end portion of the first connection portion and a second end portion; a middle portion comprising a first end portion connected to the second end portion of the root portion and a second end portion; and an end portion comprising a first end portion connected to the second end portion of the middle portion and a second end portion. ### Claim 10 (depends on 9) The retractor for periodontal surgery of claim 9, wherein the second end portion of the root portion and the first end portion of the middle portion form a preset fourth angle, and the second end portion of the middle portion and the first end portion of the end portion form a preset fifth angle. ### Claim 11 (depends on 10) The retractor for periodontal surgery of claim 10, wherein the second connection portion has a zigzag shape as the fourth angle is about 10° to about 30° and the fifth angle is about 20° to about 40°. ### Claim 12 (depends on 1) The retractor for periodontal surgery of claim 1, wherein an edge of the blade is circular or oval and the blade has a scoop shape such that a lengthwise central axis of the blade is bent with a preset radius of curvature. ### Claim 13 (depends on 12) The retractor for periodontal surgery of claim 12, wherein an end tip of the blade and the second end portion of the second connection portion form a preset sixth angle. ### Claim 14 (depends on 13) The retractor for periodontal surgery of claim 13, wherein the sixth angle is about 30° to about 50°.